Gauge



A. EISELE Aug. 3, 1943.

GAUGE Filed Jan. 15. 1941 2 Sheets-Sheet 1 Snnentor A. EIISELE Aug. 3, 1943.

GAUGE Filed Jan. 15, 1941 2 Sheets-Sheet 2 Fga.

Patented Aug. 3, 1943 UNITED l STATES PATENT OFFICE GAUGE i Andrew Eisele, Detroit, Application January-15, 1941, Serial No; 324,535

'5 cl ims. (01. 33-178) T Thi invention relates generally to gauges and more particularly to gauges for checking or test- Other objects of the invention will become ap parent from the following detailed description taken in connection with the accompanying drawings in which: Fig. 1 is a side View of the gauge shown partly broken away and in section; r

Fig. 2 is an end view of the gauge looking frcm left to right of Fig. 1;

Fig. 3 is a top plan view partly in section of the gauge, taken along the line 13-13 of Fig.1,

, Fig. 415 an enlarged fragmentaryview or the 1 gauge, taken alongtheline and. in the direction of the arrow 4-4 of Fig. 3;

Fig.5 is a cross sectional view ,of the gauge,

taken along the line 5-5 of Fig. 1-; v

Fig. 6 a fragmentary cross sectional viewof the gauge, taken along the line 6- -5 of Figs 1-;

Fig. 7 is a fragmentary cross sectional view of the gauge, taken along the line 1--'I of Fig. 1; and

Fig. 8 is a perspective view of a; part .of the 7 gauge mechanism shown removed therefrom.-

Referringto the ldrawingsnb characters of reference, the gauge shown includes an elongated 5111 11 r-treev member or rod ldwhich provides a handle for the device, andgtoone endforn and extending laterally. from th handle is attached aiieloneated arm ll. Th a m H is p ovid done thereof with a hollow boss 1,243.0 receive a reduced end portion-1,3 lof the rod l ll, therboss l2 seating against a shoulder 14- providedon the rod. to by the reduced portion L3,. The am H is tightl but detachably sew-te is the rodby a removable pin 15 which extends through aligned transverse apertures provided in the boss 12 and in the rod reduced portion l3. Carried: by the area. i l, adjacent its theror outerend, there adjustable abutment member 45 having a head 1i?!" providing an abutment surface I8.

ior engaging the outer periphery or surface of. a part such a the part to to he tested. The -.ad gust-able abutmcl t member- :5 includes astem which isreceived'in a vertical bore 20,;provided ing the stem portion of the abutment member l -5.

On the other or-cpposite end of thesupporting rod or handle it a unitary removable gauge mechanism'itl is provided having an elongated hollow bodyyfifi which extends laterally from the supporting rod is in spaced relation to and in parallelismwith the arm i i; The body is preieraoly substantially rectangular in shape and adjacent one end thereof is provided with a bore to receive a reduced upper end portion 26 of the rod lh the body 25 being detachably secured to the rod. to by a transversely extending removable Rigidly secured to the othcr'or outer end of the body 2 there is a unitary removable mechanism, designated in general by the-numeral 28, which is operable to actuate an indicator 30 to indicate the accuracy of theouter dimension or diameter of the part it or part being tested. The mechanism 2% includes a casing 3 l which is'preferably rectangular in shape having a recess 32 which is closed by end wall, as'at vE53, of the body 25 when the'casing 3! is mounted on the body 25. The body isprovided with a bore .29 which extends longitudinally thereof and opens through the body end Wall 33 to receive aneitternal tubular hollow boss 3 3 which is integral with and extends from the side wall of the v casing 3. l. The casing 3! is detachably but rigid- 1y secured to the bod 25 by a set screw 35 the inner end of which preferably engages in a notch 35 which is provided'in the side wall of the casing tubular portion 3%. a

A pair of vertically extending bores are provided in the casing iii and extend into the recess 32 and through the lower end of the casing to receive respectively a pair of centering pins 36 the lower ends of which project externally of the casing to engage the outer periphery of the part being checked. The pins 36 are secured together by a plate 37 which is secured to the inner ends of the pins 36 within the recess 32 by screws 33. Positioned between and extending parallel with the pins 35, a removable pin-like feeler member 4i) is provided and is guided for movement in a bore 4| which is provided in the casing 3 I, the axis of the bore d! being in parallelism with the aXes of the pins 36. The feeler member 30 has an end portion projecting externally ofthe casing 31 to engage the periphery of the part to be tested, the outer end of the member '36 preferably being rounded, as at Ma. Downward movement of the feeler member Ail is limited by a transverse pin 42 in the casing 3! which extends through a relatively'large aperture 43 provided inand extending transversely. of the feeler member so to retain the feeler member in the casing 3 l Substantially midway between the centering pins 36 the plate 37 is provided with a threaded aperture to receive an abutment screw E which extends upwardly and move the device to or slightly beyond the position shown in Fig. 1 or such that the feeler 7 member passes over the diameter of the part. The

i the rod 58 to rotate and through the cam through and is slidably guided in an aperture of said casing to limit downward or outward movement of thepins 36. Surrounding the adjustment screw 44, a helical coil spring 45 is provided whichacts againstthe plate 37 to move the pins 36 outwardly, the pins being limited in such movement by the headof the adjustment screw 44 engaging the top of the casing 3!.

The indicator 30 may be of any suitable type, preferably having a dial 46 provided with indicia for registration with a rotatable pointer 41, the mechanism of the indicator being enclosed in a casing 48. 'a hollow stem 49 which extends into a vertical bore 5!! provided in the body 25 which body may be slotted, as at 5!, to provide for clamping the stem 49 tightly to the body-by-means of a screw '52; The indicator tflincludes an operating member or plunger 53 which is slidably guided in the 29 in the body u25 is reduced, as at 59, to provide additional bearing support for the'rotatable rod Integral with the casing 48 there is centering pins 35 engaging the periphery of the part 19 will aid the operator in holding the device such that the axis of the feeler member iii may be kept perpendicular to the center or axis of the part IS, the pins 35 moving inwardly against the action or" the spring Q5. The feeler member i8, engaging'the outer periphery of the part will also be movedinwardly or upwardlyagainst the cam portion 62 of the rod 58 which will cause 51 on the other end thereof will move the plunger 53 upward against the action of the spring 56 to actuate the indicator Zhe indicator 351, of course, will show the checker or operator of the device whether or not the diameter of the part I!) is within the tolerance allowed. Upon moving the device from the part E9 the feeler member ii will descend by gravity, limited in such movement by the stop pin 42, and the spring 55 of the indicator will move the plunger 53 downwardly which, through the cam 57, will rotate the rod 58 until the cam 62 again engages the upper end of the feeler member M3 which is the normal or starting position of the parts of the gauge. For different size diameters to be tested; the abutment member It may be adjusted within limits and the centering pins 36 may also be adjusted by the screw 34 to vary their movement. For example, on checking parts of small diameter the pins 3i: will serve more efiiciently to center the device if they project further outwardly of the casing 53! than for parts of relatively larger diameter. Also by removing the pins l5 and 21 which secure the the diameter of the partfto' be tested. It will be seen from the above description that applicant has provided a new and improved gauge for checking or testing external diameters of parts and a gauge so constructed that it may be employed efiiciently in connection with high pro- 7 ductive methods.

58, the end 5'5 of which projects into the bore 56 t to engage the lower end 5d of the plunger 53. Intermediate its ends, the rod 58 is provided with an annularrecess 68 having a U-shaped pin GI to prevent orlimit longitudinal movement of the rod 58. The otherend of the rod 58 projects into the bore M of the casing 3i and is provided with a'flattened end portion 52 for engaging the upper end of the movable feeler member til. The iiattened end portions 5? and 62 of the rod 58 constitutecams to effect rotation. of the rod 58 for,

transferring movement of the feeler member lil to'the plunger 53 of the indicator 3?), it being noted that the surfacesvof said portions are substantially planar and that the planes occupied thereby are angularly re ated one to the other sothat such transfer of movement may be effectuated. I

- Operation As previously mentioned, the support 55 not only serves as a common support for, the transverse arm ii and the transverse body 25 but also serves as ahandle-for the user of the'device. To check or test the diameter or outer dimension of apart such asthe part it it is only necessary to move the device toward the part L) with the arm 5 l and body 25 in straddling relation thereto 'While I have shown and described my invention in detail it is to be understood that the in ventionisto be limited only by the appended claims for many changes may be made without departing from the spirit and scope of the invention.

What I claim is: y 1. In a snap acting gauge employing a fixed contact member and a coaligned movable contactlmember operable for contacting the opposite external surface portions of a body the dimension of which. is to be checked by an indicator operatively connectedto the movable contact member and responsive to movement thereof,

a "centering device comprising, a' supporting member, a pair of centering pins carried by said supporting member on opposite sides of the movable contact member for movement in parallelism with the movement of the latter and operable when simultaneously contacting the surface cooperating with the fixed contact member to locate the movable contact, member at the point of maximum dimension of the body, bridge means interconnecting said pins, and minutely movable adjustment means operatively interconnecting said supporting member and said bridge means for selectively moving said pins relatively to the movable contact member to adjust the wall surface at one end thereof, said support 2. Ina snap acting gauge employing a fixed contact member and a coaligned movable contact member operable for contacting the opposite external surface portions of a body the dimension of which is to be checked byan indicator operatively connected to the movable contact member and responsive to movement thereof, a centering device comprising, a supporting memher, a pair of centering pins carried by said supporting member on opposite sides of the movable contact member for movement in parallelism with the movement of the latter and operable when simultaneously contacting the surface cooperating with the fixed contact member to locate the movablecontact member at the point'of maximum dimension of the body, bridge means interconnecting said pins, adjustment screw means operatively interconnecting said supporting member and said bridge means for selectively moving said pins relatively to the movable contact member to adjust the relative positionthereof, a frame-like support providing a wall surface at one end thereof and having a longitudinal bore extending from the wall surface and communicating at its other end with a transverse bore, a contact head having a tubular extension projecting into said longitudinal bore, said head having a wall engaging the wall surface of the support, a pin extending from one of said wall surfaces received in an opening in p;

the other surface to prevent rotation of said head relative to said frame, an elongated motion transmittin element rotatably mounted in said longitudinal bore and tubular extension and having contact portions at its opposite end angled relatively to one another, one of said contact portions projecting into the transverse bore and the other contact portion projecting into said contact head and a movable contact member reciprocably mounted in the contact head with an inner part thereof engaging the contact portion projecting therein, the transverse bore being arranged to receive said dial indicator projection with its plunger engaging the other contact portion.

4. In a'rneasuring head for a dial indicator snap gauge with an operative plunger in a projection thereof, a frame-like support providing a having a longitudinal bore extending from the wall surface and communicating at its opposite end with a transverse bore, a contact head having a wall surface lined flush with and engaging the wall surface of said support, a tubular extension projecting from said wall surface and extending into said bore to center said wall sur-,

faces, means carried by one of said wall surfaces received in an opening in the other wall surface for preventing rotation of said head relative to the support, an elongated motion transmitting element rotatably mounted in said longitudinal bore and tubular extension and having contact portions at its opposite ends angled relatively to one another, one of said contact portions projecting into the transverse bore in the support and the other contact portion projecting into said contact head and a movable contact member reciprocably mounted in the contact head with its inner end engaging one of said contact portions, and said transverse bore being arranged to receive said dial indicator projection with its plunger directly engaging the other contact portion.

5. A measuring head for a dial indicator snap gauge with an operative plunger in a projection thereof, a frame-like support providing an end wall surface, said support having an offset longitudinal bore extending inwardly from said wall surface and communicating at its opposite end with a transverse bore; a contact head having a wall surface with a chamber extending inwardly therefrom adapted to be closed when the contact head wall surface is in engagement with the wall surface of said support, a tubular extension projecting from said wall surface and formed integral with the contact head adapted to be received in the longitudinal bore, means interposed between the wall surfaces of said support and the wall surface of said head for preventing rotation of said head relative to the support, an elongated motion transmitting bar rotatably journaled in the longitudinal bore and supported at one end by' the tubular extension and at the other end by a bearing formation adjacent the transverse bore, said bar having contact portions on each end angled with respect to each other and projecting into the contact head and transverse bore and a movable contact member reciprocably mounted in the chambered portion of the contact head with an inner part thereof engaging the contact portion projecting therein, the transverse bore being arranged to receive said dial indicator projection with its plunger engaging the other contact portion.

ANDREW EISELE. 

